Piston ring set, .040 inch overbore for 4.4 inch standard bore piston. 3 at 3/32 inch, & 1 at 3/16 inch. Ford/New Holland Diesel Engines: 201 CID, 256 CID, 268 CID, 401 CID. Ford/New Holland Tractors: 4000, 4600, 4610, 4630, 5000, 5600, 5700, 6600, 6700, 6000, 6610, 6700, 6710, 8000.